Adding email account problem

[ppcnovice]

I know I'm doing it right because I set up my other gmail account without an issue following step by step the instructions on the Gmail website. I thought as a work around I would download the gmail application but for some reason after installing running and logging in, when it tries to get my emails it stops and says that my phone doesn't support it because I don't have the required certificate. Does anyone know what this means? I don't want to have to go online everytime I want to check my second account.